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scsi: smartpqi: enhance BMIC cache flush

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- distinguish between shutdown and non-shutdown.

Reviewed-by: Scott Benesh <scott.benesh@microsemi.com>
Signed-off-by: Kevin Barnett <kevin.barnett@microsemi.com>
Signed-off-by: Don Brace <don.brace@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Kevin Barnett
2017-08-10 13:46:45 -05:00
committed by Martin K. Petersen
parent 336b681931
commit 58322fe006
2 changed files with 33 additions and 15 deletions
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27
drivers/scsi/smartpqi/smartpqi_init.c
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@@ -431,10 +431,10 @@ static int pqi_build_raid_path_request(struct pqi_ctrl_info *ctrl_info,
cdb[1] = CISS_GET_RAID_MAP;
put_unaligned_be32(buffer_length, &cdb[6]);
break;
case SA_CACHE_FLUSH:
case SA_FLUSH_CACHE:
request->data_direction = SOP_WRITE_FLAG;
cdb[0] = BMIC_WRITE;
cdb[6] = BMIC_CACHE_FLUSH;
cdb[6] = BMIC_FLUSH_CACHE;
put_unaligned_be16(buffer_length, &cdb[7]);
break;
case BMIC_IDENTIFY_CONTROLLER:
@@ -585,14 +585,13 @@ static int pqi_identify_physical_device(struct pqi_ctrl_info *ctrl_info,
return rc;
}
#define SA_CACHE_FLUSH_BUFFER_LENGTH 4
static int pqi_flush_cache(struct pqi_ctrl_info *ctrl_info)
static int pqi_flush_cache(struct pqi_ctrl_info *ctrl_info,
enum bmic_flush_cache_shutdown_event shutdown_event)
{
int rc;
struct pqi_raid_path_request request;
int pci_direction;
u8 *buffer;
struct bmic_flush_cache *flush_cache;
/*
* Don't bother trying to flush the cache if the controller is
@@ -601,13 +600,15 @@ static int pqi_flush_cache(struct pqi_ctrl_info *ctrl_info)
if (pqi_ctrl_offline(ctrl_info))
return -ENXIO;
buffer = kzalloc(SA_CACHE_FLUSH_BUFFER_LENGTH, GFP_KERNEL);
if (!buffer)
flush_cache = kzalloc(sizeof(*flush_cache), GFP_KERNEL);
if (!flush_cache)
return -ENOMEM;
flush_cache->shutdown_event = shutdown_event;
rc = pqi_build_raid_path_request(ctrl_info, &request,
SA_CACHE_FLUSH, RAID_CTLR_LUNID, buffer,
SA_CACHE_FLUSH_BUFFER_LENGTH, 0, &pci_direction);
SA_FLUSH_CACHE, RAID_CTLR_LUNID, flush_cache,
sizeof(*flush_cache), 0, &pci_direction);
if (rc)
goto out;
@@ -618,7 +619,7 @@ static int pqi_flush_cache(struct pqi_ctrl_info *ctrl_info)
pci_direction);
out:
kfree(buffer);
kfree(flush_cache);
return rc;
}
@@ -6693,7 +6694,7 @@ static void pqi_shutdown(struct pci_dev *pci_dev)
* Write all data in the controller's battery-backed cache to
* storage.
*/
rc = pqi_flush_cache(ctrl_info);
rc = pqi_flush_cache(ctrl_info, SHUTDOWN);
if (rc == 0)
return;
@@ -6737,7 +6738,7 @@ static __maybe_unused int pqi_suspend(struct pci_dev *pci_dev, pm_message_t stat
pqi_cancel_rescan_worker(ctrl_info);
pqi_wait_until_scan_finished(ctrl_info);
pqi_wait_until_lun_reset_finished(ctrl_info);
pqi_flush_cache(ctrl_info);
pqi_flush_cache(ctrl_info, SUSPEND);
pqi_ctrl_block_requests(ctrl_info);
pqi_ctrl_wait_until_quiesced(ctrl_info);
pqi_wait_until_inbound_queues_empty(ctrl_info);